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Loop - Inside a Loop

<p>Inner and Outer Loop in KNIME</p>

OUTER Loop - always check your 'Wireing' to make sure the logic will work.
Create path variables

https://forum.knime.com/t/write-multiple-csv-file-to-a-loop/44989/2?u=mlauber71

extract paths stored

https://forum.knime.com/t/add-read-sheet-protection-to-excel-file/63860/5?u=mlauber71

INNER Loop - you could convert this into a Component, make sure to allow the Flow Variables to pass

KNIME, Paths and Loops — Automate Everything

https://medium.com/p/213455788685
Example Data Reader
STARTOuter Loopinterate over Regions
Group Loop Start
STARTInner Loopiterate over Countries
Table Row to Variable Loop Start
Row Filter
ENDInner Loop
Loop End
/data/result/*.parquet
Parquet Reader
./result/<Region>.parquet
Parquet Writer
./result/
Create File/Folder Variables
Countries
Row Filter
ENDOuter Loop
Variable Loop End

Nodes

Extensions

Links

Download

To use this workflow in KNIME, download it from the below URL and open it in KNIME:

Download Workflow
Created by: m_lauber
Created at: 2025-09-01
On NodePit since: 2025-09-02
Last update: 2025-09-03
Created with KNIME version: v5.6.1

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